CVE-2021-21805 : What You Need to Know

This article provides an overview of CVE-2021-21805, detailing the OS Command Injection vulnerability found in Advantech R-SeeNet v2.4.12 (20.10.2020) and its impact, technical details, and mitigation steps.

Understanding CVE-2021-21805

CVE-2021-21805 is an OS Command Injection vulnerability in Advantech R-SeeNet v2.4.12 (20.10.2020), discovered by Talos.

What is CVE-2021-21805?

A specially crafted HTTP request can trigger arbitrary OS command execution in the ping.php script of Advantech R-SeeNet v2.4.12 (20.10.2020).

The Impact of CVE-2021-21805

With a CVSS base score of 9.8 (Critical), this vulnerability poses a high risk, allowing attackers to execute commands on affected systems without requiring any privileges.

Technical Details of CVE-2021-21805

The technical details include the Vulnerability Description, Affected Systems and Versions, and the Exploitation Mechanism.

Vulnerability Description

The vulnerability in the ping.php script of Advantech R-SeeNet v2.4.12 (20.10.2020) allows attackers to execute arbitrary OS commands via specially crafted HTTP requests.

Affected Systems and Versions

Advantech R-SeeNet v2.4.12 (20.10.2020) is affected by this vulnerability.

Exploitation Mechanism

By sending a crafted HTTP request to the ping.php script, attackers can exploit this vulnerability for OS command execution.

Mitigation and Prevention

Learn about the immediate steps to take to secure your systems from CVE-2021-21805.

Immediate Steps to Take

It is recommended to apply security patches provided by Advantech promptly to mitigate the vulnerability.

Long-Term Security Practices

Ensure secure coding practices and regular security assessments to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly update and patch Advantech R-SeeNet to protect systems from potential exploits.